Methods, devices and computer readable media for communications

Abstract

Embodiments of the present disclosure relate to method, device and computer readable media for communications. A first device performs a first type LBT procedure in unlicensed band. In response to a successful performing of the first type LBT procedure, the first device transmits, to a second device, a first sidelink positioning reference signal (PRS) sequence in the unlicensed band for ranging between the first device and the second device, and/or for positioning of the first device. The first sidelink PRS sequence is associated with the first type LBT procedure and/or a second type LBT procedure to be performed by the second device for transmitting a second sidelink PRS sequence in the unlicensed band to the first device for the ranging or the positioning.

1 - 44 . (canceled) 
     
     
         45 . A first device for wireless communication, comprising:
 at least one processor; and   at least one memory including computer program code;   wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to:   perform a first type listen before talk (LBT) procedure in an unlicensed band; and   in response to a successful performing of the first type LBT procedure, transmit, to a second device, a first sidelink positioning reference signal (PRS) sequence in the unlicensed band for ranging between the first device and the second device, and/or for positioning of the first device, wherein the first sidelink PRS sequence is associated with the first type LBT procedure and/or a second type LBT procedure to be performed by the second device for transmitting a second sidelink PRS sequence in the unlicensed band to the first device for the ranging or the positioning.   
     
     
         46 . The first device of  claim 45 , wherein the first device is caused to perform at least one or more of:
 communicate with the second device, rest of sidelink signals or channels in a licensed band for the ranging or the positioning;   apply the first sidelink PRS sequence based on the first type LBT procedure; or receive, from a third device, information about a first mapping among the first sidelink PRS sequence, the first type LBT procedure and the second type LBT procedure.   
     
     
         47 . The first device of  claim 45 , wherein the second type LBT procedure is applied by the second device based on the first type LBT procedure. 
     
     
         48 . The first device of  claim 45 , wherein the first sidelink PRS sequence is indicative of the first type LBT procedure and the second type LBT procedure. 
     
     
         49 . The first device of  claim 45 , wherein the first device is caused to perform the first type LBT procedure when it is determined that a third type LBT procedure in the unlicensed band cannot be successfully completed before the transmission of the first sidelink PRS sequence, the third type LBT procedure being different from the first type LBT procedure. 
     
     
         50 . The first device of  claim 49 , wherein:
 each of the first type LBT procedure being a 25 us LBT procedure;   the second type LBT procedure being one of a 25 us LBT procedure or a Type 1 LBT procedure; and   the third type LBT procedure being a Type 1 LBT procedure.   
     
     
         51 . The first device of  claim 45 , wherein each of the first type LBT procedure and the second type LBT procedure being a Type 2A LBT procedure. 
     
     
         52 . The first device of  claim 45 , wherein the first type LBT procedure being a Type 1 LBT procedure, and the second type LBT procedure being a Type 2C LBT procedure. 
     
     
         53 . The first device of  claim 46 , wherein the first device being an initiating device, the second device being a responding device and the third device being one of a network node and a core network node, for the ranging or the positioning. 
     
     
         54 . The first device of  claim 45 , wherein a first mapping among the first sidelink PRS sequence, the first type LBT procedure and the second type LBT procedure is predefined. 
     
     
         55 . The first device of  claim 45 , wherein the first sidelink PRS sequence is associated with a frame structure for transmission of the first sidelink PRS sequence, and the frame structure is associated with the second type LBT procedure. 
     
     
         56 . The first device of  claim 45 , wherein prior to transmitting to the second device the first sidelink PRS sequence, the first device is further caused to:
 transmit, to the second device, information about at least one of the following:   a first resource reservation for the transmission of the first sidelink PRS sequence, or   a second resource reservation for the transmission of the second sidelink PRS sequence, and   a first mapping among the first sidelink PRS sequence, the first type LBT procedure and the second type LBT procedure.   
     
     
         57 . The first device of  claim 56 , wherein the first device is caused to transmit the information in one or more of the following:
 sidelink control information (SCI) carried in a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH),   a medium access control control element (MAC CE) carried in the PSSCH; or   transmit in a licensed band, to the second device, sharing information about channel occupancy time (COT).   
     
     
         58 . The first device of  claim 56 , wherein:
 the first resource reservation indicates at least one of the following:   a starting symbol for the transmission of the first sidelink PRS sequence, or   a duration of the transmission of the first sidelink PRS sequence; and   the second resource reservation indicates at least one of the following:   a starting symbol for the transmission of the second sidelink PRS sequence, or   a duration of the transmission of the second sidelink PRS sequence.   
     
     
         59 . A second device for wireless communication, comprising:
 at least one processor; and   at least one memory including computer program code;   wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to:   detect a first sidelink positioning reference signal (PRS) sequence transmitted in an unlicensed band by a first device for ranging between the first device and the second device, and/or for positioning of the first device;   determine, based on the first sidelink PRS sequence, a first type listen before talk (LBT) procedure performed by the first device for the transmission of the first sidelink PRS sequence in the unlicensed band;   determine, based on the first type LBT procedure, a second type LBT procedure; and   perform the second type LBT procedure for transmission of a second sidelink PRS sequence in the unlicensed band to the first device for the ranging or the positioning.   
     
     
         60 . The second device of  claim 59 , wherein the first sidelink PRS sequence is associated with a frame structure for transmission of the first sidelink PRS sequence, and the frame structure is associated with the second type LBT procedure;
 wherein the second device is further caused to determine the frame structure based on the first sidelink PRS sequence; and   wherein the second device is caused to determine, based on the first type LBT procedure and the frame structure, the second type LBT procedure to be performed.   
     
     
         61 . The second device of  claim 59 , wherein the second device is further caused to:
 receive, from the first device, information about a first resource reservation for the transmission of the first sidelink PRS sequence; and   wherein the second device is caused to detect the first sidelink PRS sequence based on the information.   
     
     
         62 . The second device of  claim 61 , wherein the first resource reservation indicates at least one of the following:
 a starting symbol for the transmission of the first sidelink PRS sequence, or   a duration of the transmission of the first sidelink PRS sequence.   
     
     
         63 . The second device of  claim 61 , whereinthe second device is caused to perform one or more of:
 receive the information about the first resource reservation in one of the following:   sidelink control information (SCI) carried in a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) in licensed band, or a medium access control control element (MAC CE) carried in the PSSCH in licensed band; or   receive, from the first device, information about a second resource reservation for the transmission of the second sidelink PRS sequence; and wherein the second device is caused to transmit the second sidelink PRS sequence based on the information.   
     
     
         64 . The second device of  claim 63 , wherein:
 the second resource reservation indicates at least one of the following:   a starting symbol for the transmission of the second sidelink PRS sequence, or   a duration of the transmission of the second sidelink PRS sequence; or   the second device is caused to receiving the information about the second resource reservation in one of the following:   sidelink control information (SCI) carried in a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) in licensed band, or   a medium access control control element (MAC CE) carried in the PSSCH in licensed band.